The Nitto Invo is a great value. Their price point is excellent, and I have been running a full set for more than five years. That is impressive. As mentioned in another thread, I find that the rears need to be warmed up (with a good burnout or two) before they really stick, but I've been pretty happy with them. They are predictable and consistent. No worries in the rain, good cornering adhesion, and they are quiet - note that my Corsa Extreme exhaust may be inclined to outdo any road noise from the tires anyway, but even at low rpm cruising speed I don't hear anything from the tires.
Although I plan to replace them next year with Sport Cup 2's, I would have no problem with buying another set of Nittos if the Michelins disappoint me. Michelin makes great tires - but in my experience they don't seem to last very well. I didn't get 10k out of my Pilot Power on my bike, and got just over that on the first Pilot Sport. I don't particularly like replacing tires every season or even every second season.